Advanced Science
·
2025
·
IF 14.1
Zheng Zhang,Cui Liu,Nian Li,Wei Guo,Ying Li,Pengzhan Yang,Shudong Zhang,Zhenyang Wang
Here electrospinning and freeze-drying techniques are combined to fabricate an anisotropic SiC@SiO 2 ceramic fiber aerogels (A-SiC@SiO 2 -FAs). The anisotropic structure of the A-SiC@SiO 2 -FAs features aligned layers stacking layer-by-layer with the same direction and highly oriented 1D fibers inside each layer. The A-SiC@SiO 2 -FAs exhibit anisotropic thermal properties with an extremely low thermal conductivity of 0.018 W m −1 K −1 in the transverse direction (perpendicular to the SiC@SiO 2 nanofibers) and ≈5 times higher thermal conductivity of 0.0914 W m −1 K −1 in the axial direction due to the highly oriented SiC@SiO 2 nanofibers. The anisotropy factor of the A-SiC@SiO 2 -FAs is as high as 5.08, which exceeds most of the currently reported thermal insulation materials with anisotropic structural design, such as anisotropic wood aerogels, biaxially anisotropic PI/BC aerogels and anisotropic MXene foam, etc. The A-SiC@SiO 2 -FAs also have excellent thermal stability, maintaining structural integrity in oxidative environments at temperatures up to 1300 ° C. Moreover, these structurally distinct A-SiC@SiO 2 -FAs result in superior elastic deformation with a radial recoverable strain exceeding 60% and an axial specific modulus of 5.72 kN m kg −1 . These findings emphasize the potential of SiC nanofiber aerogels in extreme thermal environments and provide valuable insights for designing anisotropic insulation materials.
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DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 9
·1946
·
IF 4.2
Yan Ma,Kai Wang,Sikai Liang,Zhongqing Li,Zhiyuan Wang,Jun Shen
The Mn-Fe oxide material possesses the advantages of abundant availability, low cost, and non-toxicity as an energy storage material, particularly addressing the limitation of sluggish reoxidation kinetics observed in pure manganese oxide. However, scaling up the thermal energy storage (TCES) system poses challenges to the stability of the reactivities and mechanical strength of materials over long-term cycles, necessitating their resolution. In this study, Mn-Fe granules were fabricated with a diameter of approximately 2 mm using the feasible and scalable drop technique, and the effects of Y2O3-stabilized ZrO2(YSZ) and SiO2doping, at various doping ratios ranging from 1–20 wt%, were investigated on both the anti-sintering behavior and mechanical strength. In a thermal gravimetric analyzer, the redox reaction tests showed that both the dopants led to an enhancement in the reoxidation rates when the doping ratios were in an appropriate range, while they also brought about a decrease in the reduction rate and energy storage density. In a packed-bed reactor, the results of five consecutive redox tests showed a similar pattern to that in a thermal gravimetric analyzer. Additionally, the doping led to the stable reduction/oxidation reaction rates during the cyclic tests. In the subsequent 120 cyclic tests, the Si-doped granules exhibited volume expansion with a decreased crushing strength, whereas the YSZ-doped granules experienced drastic shrinkage with an increase in the crushing strength. The 1 wt% Si and 2 wt% Si presented the best synthetic performance, which resulted from the milder sintering effects during the long-term cyclic tests.
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DOI
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高影响因子
CEMENT AND CONCRETE RESEARCH
·
2025
·
IF 13.1
Gang Qiao,Yuyang Zhao,Pan Wang,Dongshuai Hou,Binmeng Chen
Interface between calcium silicate hydrate (CSH) and polymers is crucial for the mechanical properties and durability. However, direct experimental determination of interfacial mechanics at nanoscale has not been reported. Herein, atomic force microscopy (AFM) with grafted Poly (1-vinylpyrrolidone- co -acrylic acid) (PVP-co-PAA) on AFM tips were utilized to measure interfacial properties between CSH and PVP-co-PAA under four C/S at nanoscale. The interfacial force curves were clearly presented for the first time. Results showed that compared to as-received tip, representing SiO 2 , the adhesive force and energy dissipation increased by 72.42 % and 417 %. Interface separation speed was delayed by 300 % ∼ 400 %. Molecular simulations of interfacial separation aligned with AFM experimental results, where interfacial ion-pair, dynamics stability and polymer conformational changes provided insights for AFM experiment on adhesion force and delay of interface separation speed. Determination of interfacial mechanics by AFM experiment and insights by molecular simulation decoded CSH/PVP-co-PAA interfaces thoroughly.
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DOI
高影响因子
Journal of Coatings Technology and Research
·
2025
·
IF 2.8
Zhou Jie,Su Jingying,Su Fenghua,Zhao Tianxin,Li Ji,Yang Pengfei,Zhang Qingyu
At present, superhydrophobic coatings have a wide range of applications in self-cleaning, drag reduction, and corrosion protection. However, their poor mechanical stability has a significant impact on the service life and effectiveness of the coatings. In addressing this challenge, this study introduced epoxy resin (EP) with high strength and strong adhesion as the resin matrix. The composite coating, synthesized through a straightforward spraying technique, incorporates modified carbon nanotubes (F-CNTs) and hydrophobic fumed nanosilica (SiO 2 ) as fillers. The robust EP/F-CNTs/SiO 2 superhydrophobic coating exhibited excellent anti-rubbing ability and superadhesion strength, which was attributed to the EP intermediate layer significantly enhancing the adhesion strength between the coating and the stainless steel substrate with a remarkable adhesion grade of one. Tafel and EIS test results revealed a corrosion inhibition efficiency of up to 99.75% for the coating. The exceptional corrosion resistance of the coating is attributed to the outstanding electron transfer capability of F-CNTs. In addition, the coating could resist corrosion from strong acids and bases. It is believed that the facile and low-cost method offers an effective strategy and promising industrial applications for fabricating robust and super anti-corrosion superhydrophobic surfaces on various metallic materials.
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高影响因子
ChemMedChem
·
2017
·Vol. 12
·期 19
·1600-1609
·
IF 3.225
Xinyu Hu,Yongmei Wang,Liangliang Zhang,Man Xu,Jianfa Zhang,Wei Dong
Graphical The power of attraction : Salecan-based composite hydrogels have magnetic-field-responsive properties due to the introduction of Fe 3 O 4 @SiO 2 nanoparticles into the hydrogel system. As a model anticancer drug, doxorubicin (DOX) was loaded into the composite hydrogels with high efficiency via strong electrostatic interactions between the amine group in DOX and carboxyl groups present in the hydrogels. These DOX-loaded salecan-g-PPH/Fe 3 O 4 @SiO 2 composite hydrogels show pH-responsive controlled drug release, and the liberated DOX can be effectively taken up by A549 cells. Salecan is a water-soluble extracellular β-glucan and has excellent physicochemical and biological properties for hydrogel preparation. In this study, a new pH/magnetic field dual-responsive hydrogel was prepared by the graft copolymerization of salecan with 4-pentenoic acid (PA) and N -hydroxyethylacrylamide (HEAA) in the presence of Fe 3 O 4 @SiO 2 nanoparticles for doxorubicin hydrochloride (DOX) release. Integration of Fe 3 O 4 @SiO 2 nanoparticles in salecan-g-poly(PA-co-HEAA) copolymers afforded magnetic sensitivity to the original material. DOX-loaded hydrogels exhibited a clear capacity for pH/magnetic field dual-responsive controlled drug release. Lowering the pH to acidic conditions or introducing an external magnetic field caused an enhancement in DOX release. This salecan-g-poly(PA-co-HEAA)/Fe 3 O 4 @SiO 2 composite hydrogel is a promising drug carrier for magnetically targeted drug delivery with enhanced DOX cytotoxicity against A549 cells.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Muhammad Shoaib,Shengyuan Xu,Haocheng Zhai,Qihui Sun,Shahab Ahmad,Maysam alsharawneh,Yifan Liu,Yang Guo,Xinyu Mu,Wei Tian,Xian Jian
An ideal and distinctive microwave-absorbing carbon-based material feature an eco-friendly, low-cost fabrication process combined with high loss efficiency and strong absorption potential. Here we design an innovative nanohybrids with carbon nano onion (CNO) from paraffin ultra-pure lamp oil by flame method awning unique structure to boost up the dielectric loss. And TiO 2 is introduced for efficient microwave absorption loss through an in-situ process using C 7 H 8 O and TiCl 4 , while SiO 2 plays a critical role in controlling the dielectric constant through the use of tetraethyl orthosilicate (TEOS). To boost up the nanohybrids effective loss mechanism the material is exposed to a carbon capsule (CC) utilizing acetylene (C 2 H 2 ) as a carbon source for 5 minutes under argon to prepare CNO/TiO 2 /SiO 2 /CC nanohybrids. The nearby dual-nanocarbon forms multi-level interfaces enhancing the multi-level rebound and microwave absorption of the microwave interfaces. The as-designed CNO/TiO 2 /SiO 2 /CC has effective minimum reflection loss (RL min ) value of -54.4 dB and the maximum effective absorption bandwidth (EAB max ) of 5.5 GHz at a thickness of 1.9 mm. It also has good thermal conductivity. Hence, this work confirms that high-performance nanohybrids derived from paraffin ultra-pure lamp oil are promising candidates, providing a novel approach for the design and development of carbon-based microwave absorbers.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Liu Yunan,Fu Renli,Lu Ran,Shen Minhao,Hu Yunjia,Bei Guoping
Low Temperature Co-Fired Ceramic (LTCC) substrates used for microwave circuits typically must have low dielectric loss and low permittivity, as well as the ability to co-fire with metals. The dielectric properties of the microcrystalline glass materials used as the LTCC substrates are closely related to the crystallization process during sintering. This study focuses on the crystallization process of CaO-B 2 O 3 -SiO 2 microcrystalline glass. Wollastonite and pseudowollastonite seeds were used to control the degree of crystal precipitation. The phase composition and microstructure of each sample were analyzed in detail to elucidate the changes in the dielectric properties and sintering performance of the material. The addition of crystal seeds as nucleation sites promoted crystallization and led to the formation of quartz crystals. The sintered samples exhibited excellent dielectric properties: ε r < 4 at 18 GHz, tan δ < 0.0015, and Q × f > 12000 GHz. They have great potential as high-performance LTCC substrates.
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高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Bo Zhu,Bo Yang,Xu Sun,Xinyu Tao,Xinlao Wei
Polymer insulation materials are affected by electromagnetic fields, mechanical stress, long-term illumination, ambient temperature, and other operating conditions. These conditions can cause water trees and electrical trees damage, resulting in insulation failure. Self-healing technology is the fundamental way to solve this problem. However, the effective self-healing of water trees and electrical tree damage in insulating materials is extremely challenging. To solve this problem, a dual-responsive self-healing insulating material was prepared by doping 1% modified silicon dioxide, which made a breakthrough in the self-healing and suppression of electrical trees and water trees, and doping modified silicon dioxide particles enhanced intermolecular interaction and improved material mechanics and insulation performance. When electrical and water-mixed tree branches aging occurs, oligomers generated by grafted siloxane groups and acrylate groups can effectively fill the pores of the electrical and water trees on top of the physical filling of the pores by silicon dioxide particles. The performance of the cured material is close to that of the pure sample. This method realizes the dual-response self-healing of the insulation material after the aging of the electro-hydro mixed tree, which provides a new way to repair polyethylene cable insulation and has great potential in practical applications.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 36
·16909-16917
·
IF 3.5
Xie Jingru,Fu Zhifen,Cheng Qing,Chen Chen,She Yubin,Li Xiangyi
Low temperature co-fired ceramics (LTCC) technology is extensively utilized to meet the requirements of device integration and miniaturization. Low-fired Li 3 Mg 2 NbO 6 ceramics doped with x wt% Li 2 O–MgO–B 2 O 3 –CaF 2 –SiO 2 glass (LMBCS, x = 0.5, 1.0, 1.5, 2.0) were prepared by the solid-state reaction method for applications in microwave communication materials. All samples exhibited a single-phase Li 3 Mg 2 NbO 6 structure. The addition of LMBCS glass effectively reduced the sintering temperature of Li 3 Mg 2 NbO 6 ceramics from 1250 °C to 875 °C. And adding LMBCS glass improved the Q × f value of Li 3 Mg 2 NbO 6 ceramics. The Li 3 Mg 2 NbO 6 -1.0wt% LMBCS ceramics exhibited outstanding microwave dielectric properties: ε r = 16.8, Q × f = 89,495 GHz, τ f = − 27.4 ppm/°C at 875 °C, which indicates that this ceramic is potential candidate materials for LTCC.
研究领域:
材料科学
·
电子陶瓷
·
功能材料
·
无机非金属材料
·
微波通信材料
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DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 38
·385705
·
IF 2.9
Yongguang Xiao,Lisha Yang,Yong Jiang,Siwei Liu,Gang Li,Jun Ouyang,Minghua Tang
Lu doped Hf0.5Zr0.5O2 (HZO) ferroelectric films were prepared on Pt/TiN/SiO2/Si substrate by chemical solution deposition method, and an interfacial engineering strategy for improving the ferroelectric property was explored by capping the Lu doped HZO films with a cerium oxide layer. Compared with the Lu doped HZO film without the CeOx coating layer, the Lu doped HZO film with the CeOx coating layer has a larger remanent polarization (2Pr = 34.72 µC cm−2) and presents weaker wake-up behavior, which result from the higher orthogonal phase ratio and the lower oxygen vacancy of the CeOx coated Lu doped HZO film. In addition, the CeOx coating can remarkably improve the fatigue resistance and retention performance of the Lu doped HZO films. It is hoped that the results can provide an effective approach for the realization of high-performance and highly reliable hafnium oxide based ferroelectric thin films.
研究领域:
材料科学
·
铁电材料
·
薄膜
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 8
·e5707
·
IF 3.14
Laiyun Zhou,Mingliang Wang,Kaixuan Wang,Tiantian Wen,Lanzhi Wang
Fe 3 O 4 @SiO 2 -CeCl 3 catalyzed chemoselective synthesis of functionalized 3-substituted-1,5-benzodiazepines via one-pot multicomponent and domino reactions has been developed. During the one-pot synthesis process, one new cycle and four new bonds (one C–C, two C–N and one C=C) were constructed by the nucleophilic addition and eliminate reaction (dehydration etc.) process, intramolecular proton transfer and cyclization process. The major advantages of the present method are good to excellent yields, shorter reaction time, simple experimental procedure, easy work up, mild reaction conditions, recyclability of the catalyst and ability to tolerate a variety of functional groups which gives economical as well as ecological rewards.
研究领域:
有机化学
·
药物化学
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高影响因子
CURRENT MEDICINAL CHEMISTRY
·
2024
·
IF 3.5
Cheng Xiaomei,Liu Chang,Cai Yuanyuan,Li Xiangzi,Zhao Ruirui,Feng Yan,Wang Meifang
Background: Nickel nanomaterials play an important role in biological applications,
but they have high toxicity and poor biocompatibility. To overcome these defects,
we coated the surface of Ni nanotubes with different thicknesses of SiO2 to reduce
cytotoxicity, improve biocompatibility, and broaden their biological application value.
Objective: This study aimed to construct Ni nanotubes with different thicknesses of SiO2
nanoshells; investigate the effects of silicon layer thickness, incubation time, and cell
line category on the cytotoxicity of the as-synthesized materials, and evaluate the biocompatibility
of the materials by biological enzymes. The Ni@SiO2-NH2 was selected
for use as an adsorbent for the adsorption and purification of histidine-rich proteins,
such as Bovine Hemoglobin (BHb).
Methods: Magnetic Ni nanotubes were prepared by the template-chemical deposition
method. A modified version of the Stöber process was used for the SiO2 coating of
Ni@SiO2 nanotubes, and adjusted by changing the volume of TEOS for different thicknesses
of SiO2 nanoshells.
Results: Different cell lines containing tumor cells and normal cells were used in the
toxicity experiment, which confirmed the low cytotoxicity and good biocompatibility of
Ni@SiO2. To achieve high efficiency of immobilization and purification of histidine-
rich proteins, Ni@SiO2-NH2 was obtained by introducing the amino functional
group. The Ni@SiO2-NH2 was found to possess lower cytotoxicity and higher adsorption
capacity compared to other synthesized materials. Besides, the Ni@SiO2-NH2 also
exhibited good selectivity of histidine-rich proteins.
Conclusion: This work has not only provided ideas for reducing the cytotoxicity and improving
the biocompatibility of biological nanomaterials, but also laid a foundation for
subsequent biological applications.
研究领域:
材料科学
·
生物医学工程
·
蛋白质组学
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